Improvement in looms



- HENRY e. DAVIS.

Improvement in Looms.

Patented Nov. 21,1871.

No.12Ll61.

- D the shaft-supporting bearings.

PATENT OFFICE.

HENRY G. DAVIS, OF WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN LOOMS.

Specification forming part of Letters Patent No. 121,161, dated November21, 1 871.

To all whom it may concern:

. Be it known that I, HENRY G. DAVIS, of the city and county ofWorcester and Commonwealth of Massachusetts, have invented certain newand useful Improvements in Looms; and I do hereby declare the followingto be a full, clear, and exact description of the same, reference beinghad to the accompanying drawing which forms a part of thisspecification, and in which- Figure 1 represents a plan view of so muchof a loom as is necessary to illustrate my present invention. Fig. 2represents a vertical section of the same at line A B, Fig. 1. Fig. 3represents, on a larger scale, an end view of one of the shaftbearings,showing its connection with the main frame of the loom. Fig. 4represents a vertical central section of the shaft-bearing, and Fig. 5represents, on a larger scale, a front view of one end of theshuttle-guard.

The nature of my invention consists: First, in certain improved devicesfor connecting the lay or batten of the loom to its operating cranks,whereby an easy motion of the lay is obtained anda dwell is produced, ashereafter described. Second, in a peculiarly-constructed shaftbearing orbox, and the combination of the same with the main frame of the loom, ashereinafter set forth. Third, in a peculiarly-constructed shuttle-guard,as hereafter described.

In the drawing, the parts marked A represent the main frame of the loom.B indicates the crank-shaft. 0 indicates the lay or batten, and E Eindicate short connecting pieces or arms, one end of which are arrangedto work on the cranks B of the shaft B, while their other ends arepivoted between backward-projecting ear-pieces at the upper ends ofswinging stafis F, which staffs stand in upright positions beneath thearms E, and are pivoted, near their lower ends, upon adjustable studs Gsecured in vertical slots formed in the lower portion of the frame A. H11 indicate connecting rods or arms, which join the upper ends of thestaffs F to the standards 0 of the lay O. The connections H are pivotedat their rear ends between forward-projecting ear-pieces on the staffsF, and their forward ends are pivoted to the standards 0. The heads orcared portion of the staff F may be cast inone piece with the uprightportion thereof, or be otherwise rigidly secured thereto, and said headsform links to connect the arms E and H to each other, so that all of theparts will be moved by the action of the cranks B, the staffs F swingingforward and backward upon their studs G, and supporting the ends of thearms E H in such a manner that the upward and downward motion of thecranks as they revolve will not be communicated to the arms H, while theforward and backward motion will be transmitted to said arms and thusoperate the lay (l. The result of this construction and arrangement ofthe parts is that an easy and desirable motion of the lay is obtainedfor beating up the filling-threads, and also a dwell is produced duringthe time the shuttle is passing across the loom. This dwell is not anentire suspension of the motion of the lay, but the movement is soslight that, practically, the same beneficial result is produced asthough the lay came to afull stop, while the transition from thebackward to the forward movement of the lay is so gradual and easy thatthe loom can be run at a very high speed without occasioning anyinjurious jarring or vibration. The dwell and gradual change in thedirection of motion is produced by the swinging downward of the rear endof the connecting-arms E during the backward and downward sweep of thecranks. A series of holes, f, are formed in the lower part of the staffsF, and the staffs can be adjusted to greater or less length by arrangingthe studs G in different holes f. The studs G can also be adjusted up ordown in the vertical slots, wherein they are secured, by means ofclamping-nuts upon their shanks, which nuts screw up against the frameat the side of the slots. By raising or lowering the staffs F, and bylengthening or shortening their sweep, the duration of the dwell isincreased or diminished, and the movement and force of the lay inbeating up the filling is regulated to suit the requirements ofdifferent varieties of goods. The boxes or bearings D, in which theshaft B is supported and turns, are made in rectangular form, and aresecured in similar-shaped openings in the frame A, as shown, the sidesof the box being arranged obliquely to the horizontal plane. Grooves areformed upon the two sides of the box D, which fit onto the edge of theframe at the two lower sides of the openings and thus retain the box inplace, where it is firmly secured in position by a screw or bolt, K,fitted in the upper angle of the box and arranged to turn up against theframe at the top of the opening, as illustrated in Figs. 3 and 4. Acheck-nut may be arranged upon the screw, if desired, to turn downagainst the top of the bearing, and thus prevent the screw from workingloose with the jar of the machine. With this form and arrangement theboxes or bearings D can be very conveniently and cheaply constructed andattached to or removed from the frame A. They are simple and durable,and are not liable to derangement or to become loose upon the frame whenrunning the loom. This form of box is applicable to all theshaft-bearings. L indicates the shuttleguard, consisting of a leathercord extended across the loom above the shed, with its ends secured byscrews or otherwise to hinged arms or standards M, fastened to andprojecting forward from the hand-rail N, as shown. The arms M are hingedbetween oblique earpieces, m, in such a manner that they can swingdiagonally upward, and the inclination of the joint may be such that oneof the arms M can be swung upward while the other remains down, the cordL being drawn taut, but not strained more than it is when both ends aredown. With this arrangement of the guard the loom can be started withone end of the guard raised without danger of the cord interfering withthe web, and the guard can be swung down into position while the loom isrunning, so that no time is lost in adjusting the guard. When both ofthe arms M are turned up the guard-cord L is slaokened and raised, andthe operator is allowed free access to the warp-threads throughout thefull width of the loom. The cord may be made of leather or othermaterial; but I prefer a rolled-leather tube'cord so constructed as topresent the grain of the leather upon the whole outer surface, as it issmoother and more durable than a rough leather cord.

Having described my improvements in looms, what I claim as new and of myinvention, and desire to secure by Letters Patent, is-

1. The combination, with the crank-shaft B B and lay C G, of the doubleconnecting-arms E H and swinging staifs F, substantially as and for thepurposes set forth.

2. The combination, with the connecting-arms E and H, of the adjustablestaffs F and adjustable studs G, substantially as and for the purposesset forth.

3. The combination, with the crank-shaft B and frame A, of therectangular bearing-box D and set-screw K, substantially as andfor thepurposes set forth.

4. The combination, with the hand-rail N, of the shuttle-guard, composedof the obliquelyhinged arms M and cord L, substantially as shown anddescribed.

HENRY G. DAVIS. Witnesses:

THOS. H. DODGE,

CHAS. H. BURLEIGH. (95)

